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Ehrmann S, Barbier F, Li J. Aerosolized Antibiotic Therapy in Mechanically Ventilated Patients. Am J Respir Crit Care Med 2024; 210:730-736. [PMID: 38984938 DOI: 10.1164/rccm.202402-0437cp] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2024] [Accepted: 06/03/2024] [Indexed: 07/11/2024] Open
Abstract
Delivering antibiotics directly to the respiratory tract through inhalation to address lung infections has garnered clinical and scientific interest for decades, given the potential favorable pharmacokinetic profile of this administration route. Among critically ill patients, the burden of healthcare-associated pulmonary infections particularly drove continued interest in delivering inhaled antibiotics to intubated patients. We present a concise overview of the existing rationale and evidence and provide guidance for implementing inhaled antibiotics among ventilated critically ill patients, emphasizing insights from recent literature.
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Affiliation(s)
- Stephan Ehrmann
- Médecine Intensive Réanimation, Centre d'Investigation Clinique de Tours, Institut national de la santé et de la recherche médicale 1415, CRICS-TriggerSEP French Clinical Research Infrastructure Network, Centre Hospitalier Régional Universitaire de Tours, Tours, France
- Centre d'étude des pathologies respiratoires, Institut national de la santé et de la recherche médicale U1100, Tours, France
| | - François Barbier
- Centre d'étude des pathologies respiratoires, Institut national de la santé et de la recherche médicale U1100, Tours, France
- Médecine Intensive Réanimation, Centre Hospitalier Universitaire de Orléans, Orleans, France; and
| | - Jie Li
- Division of Respiratory Care, Department of Cardiopulmonary Sciences, Rush University, Chicago, Illinois
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Ghosh S. Polymyxin B Plus Aerosolized Colistin vs Polymyxin B Alone in Hospital-acquired Pneumonia ("AEROCOL" Study): A Feasibility Study. Indian J Crit Care Med 2024; 28:792-795. [PMID: 39239172 PMCID: PMC11372667 DOI: 10.5005/jp-journals-10071-24767] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2024] [Accepted: 07/10/2024] [Indexed: 09/07/2024] Open
Abstract
Introduction In hospital-acquired pneumonia (HAP) due to extensively drug resistant gram-negative pathogens, can treatment with high-dose colistin aerosolization using specific aerosol delivery protocol, improve clinical outcome in addition to systemic polymyxin-B? Materials and methods In a randomized control trial, invasively ventilated adult ICU patients with HAP in whom clinicians decided to start systemic polypeptide antibiotics, were randomized to receive either intravenous polymyxin-B plus high-dose colistin nebulization (5-MIU 8-hourly) using specific protocol or intravenous polymyxin-B alone. Results The study was closed early after recruiting 60% of planned patients because of slow rate of recruitment (24 patients in over 30 months). Treatment success (Primary outcome) was nonsignificantly higher in intervention group (63.66 vs 30.77%; p = 0.217). There was higher rate of microbiological cure in intervention group (60 vs 9.09%: p = 0.018). Numerically better secondary outcomes including fever-free days, ventilator- or vasopressor free days at day-7, ICU and hospital mortality also did not reach statistical significance. Two episodes of transient hypoxia were seen during aerosol delivery. However, overall incidences of adverse effects were not different between groups. Conclusion This study could not confirm superiority of high-dose colistin aerosolization plus systemic polymyxin-B strategy over polymyxin-B alone in treating HAP due to extensive drug resistance (XDR) gram-negative pathogens. How to cite this article Ghosh S. Polymyxin B Plus Aerosolized Colistin vs Polymyxin B Alone in Hospital-acquired Pneumonia ("AEROCOL" Study): A Feasibility Study. Indian J Crit Care Med 2024;28(8):792-795.
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Affiliation(s)
- Supradip Ghosh
- Department of Critical Care Medicine, Fortis Escorts Hospital, Faridabad, Haryana, India
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Khilnani GC, Tiwari P, Mittal S, Kulkarni AP, Chaudhry D, Zirpe KG, Todi SK, Mohan A, Hegde A, Jagiasi BG, Krishna B, Rodrigues C, Govil D, Pal D, Divatia JV, Sengar M, Gupta M, Desai M, Rungta N, Prayag PS, Bhattacharya PK, Samavedam S, Dixit SB, Sharma S, Bandopadhyay S, Kola VR, Deswal V, Mehta Y, Singh YP, Myatra SN. Guidelines for Antibiotics Prescription in Critically Ill Patients. Indian J Crit Care Med 2024; 28:S104-S216. [PMID: 39234229 PMCID: PMC11369928 DOI: 10.5005/jp-journals-10071-24677] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2024] [Accepted: 03/20/2024] [Indexed: 09/06/2024] Open
Abstract
How to cite this article: Khilnani GC, Tiwari P, Mittal S, Kulkarni AP, Chaudhry D, Zirpe KG, et al. Guidelines for Antibiotics Prescription in Critically Ill Patients. Indian J Crit Care Med 2024;28(S2):S104-S216.
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Affiliation(s)
- Gopi C Khilnani
- Department of Pulmonary, Critical Care and Sleep Medicine, PSRI Hospital, New Delhi, India
| | - Pawan Tiwari
- Department of Pulmonary, Critical Care and Sleep Medicine, AIIMS, New Delhi, India
| | - Saurabh Mittal
- Department of Pulmonary, Critical Care and Sleep Medicine, AIIMS, New Delhi, India
| | - Atul P Kulkarni
- Division of Critical Care Medicine, Department of Anaesthesia, Critical Care and Pain, Tata Memorial Hospital, Homi Bhabha National Institute, Mumbai, Maharashtra, India
| | - Dhruva Chaudhry
- Department of Pulmonary and Critical Care Medicine, University of Health Sciences, Rohtak, Haryana, India
| | - Kapil G Zirpe
- Department of Neuro Trauma Unit, Grant Medical Foundation, Pune, Maharashtra, India
| | - Subhash K Todi
- Department of Critical Care, AMRI Hospital, Kolkata, West Bengal, India
| | - Anant Mohan
- Department of Pulmonary, Critical Care and Sleep Medicine, AIIMS, New Delhi, India
| | - Ashit Hegde
- Department of Medicine & Critical Care, P D Hinduja National Hospital, Mumbai, India
| | - Bharat G Jagiasi
- Department of Critical Care, Kokilaben Dhirubhai Ambani Hospital, Navi Mumbai, Maharashtra, India
| | - Bhuvana Krishna
- Department of Critical Care Medicine, St John's Medical College and Hospital, Bengaluru, India
| | - Camila Rodrigues
- Department of Microbiology, P D Hinduja National Hospital, Mumbai, India
| | - Deepak Govil
- Department of Critical Care and Anesthesia, Medanta – The Medicity, GuruGram, Haryana, India
| | - Divya Pal
- Department of Critical Care and Anesthesia, Medanta – The Medicity, GuruGram, Haryana, India
| | - Jigeeshu V Divatia
- Department of Anaesthesiology, Critical Care and Pain, Tata Memorial Hospital, Homi Bhabha National Institute, Mumbai, Maharashtra, India
| | - Manju Sengar
- Department of Medical Oncology, Tata Memorial Center, Homi Bhabha National Institute, Mumbai, Maharashtra, India
| | - Mansi Gupta
- Department of Pulmonary Medicine, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow, Uttar Pradesh, India
| | - Mukesh Desai
- Department of Immunology, Pediatric Hematology and Oncology Bai Jerbai Wadia Hospital for Children, Mumbai, Maharashtra, India
| | - Narendra Rungta
- Department of Critical Care & Anaesthesiology, Rajasthan Hospital, Jaipur, India
| | - Parikshit S Prayag
- Department of Transplant Infectious Diseases, Deenanath Mangeshkar Hospital, Pune, Maharashtra, India
| | - Pradip K Bhattacharya
- Department of Critical Care Medicine, Rajendra Institute of Medical Sciences, Ranchi, Jharkhand, India
| | - Srinivas Samavedam
- Department of Critical Care, Ramdev Rao Hospital, Hyderabad, Telangana, India
| | - Subhal B Dixit
- Department of Critical Care, Sanjeevan and MJM Hospital, Pune, Maharashtra, India
| | - Sudivya Sharma
- Department of Anaesthesiology, Critical Care and Pain, Tata Memorial Hospital, Homi Bhabha National Institute, Mumbai, Maharashtra, India
| | - Susruta Bandopadhyay
- Department of Critical Care, AMRI Hospitals Salt Lake, Kolkata, West Bengal, India
| | - Venkat R Kola
- Department of Critical Care Medicine, Yashoda Hospitals, Hyderabad, Telangana, India
| | - Vikas Deswal
- Consultant, Infectious Diseases, Medanta - The Medicity, Gurugram, Haryana, India
| | - Yatin Mehta
- Department of Critical Care and Anesthesia, Medanta – The Medicity, GuruGram, Haryana, India
| | - Yogendra P Singh
- Department of Critical Care, Max Super Speciality Hospital, Patparganj, New Delhi, India
| | - Sheila N Myatra
- Department of Anaesthesiology, Critical Care and Pain, Tata Memorial Hospital, Homi Bhabha National Institute, Mumbai, Maharashtra, India
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Zhou Y, Wang G, Zhao Y, Chen W, Chen X, Qiu Y, Liu Y, Wu S, Guan J, Chang P, Liu Y, Liu Z. Efficacy and safety of different polymyxin-containing regimens for the treatment of pneumonia caused by multidrug-resistant gram-negative bacteria: a systematic review and network meta-analysis. Crit Care 2024; 28:239. [PMID: 39004760 PMCID: PMC11247855 DOI: 10.1186/s13054-024-05031-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2024] [Accepted: 07/09/2024] [Indexed: 07/16/2024] Open
Abstract
BACKGROUND The optimal administration of polymyxins for treating multidrug-resistant gram-negative bacterial (MDR-GNB) pneumonia remains unclear. This study aimed to systematically assess the efficacy and safety of three polymyxin-containing regimens by conducting a comprehensive network meta-analysis. METHODS We comprehensively searched nine databases. Overall mortality was the primary outcome, whereas the secondary outcomes encompassed microbial eradication rate, clinical success, acute kidney injury, and incidence of bronchospasm. Extracted study data were analyzed by pairwise and network meta-analyses. Version 2 of the Cochrane risk-of-bias tool and the Risk of Bias in Nonrandomized Studies of Interventions (ROBINS-I) assessment tool were used to assess the risk of bias in randomized trials and cohort studies, respectively. RESULTS This study included 19 observational studies and 3 randomized controlled trials (RCTs), encompassing 3318 patients. Six studies with high risk of bias were excluded from the primary analysis. In the pairwise meta-analysis, compared to the intravenous (IV) polymyxin-containing regimen, the intravenous plus inhaled (IV + IH) polymyxin-containing regimen showed a significant decrease in overall mortality, while no statistically significant difference was found in the inhaled (IH) polymyxin-containing regimen. The network meta-analysis indicated that the IV + IH polymyxin-containing regimen had significantly lower overall mortality (OR 0.67; 95% confidence interval [CI] 0.50-0.88), higher clinical success rate (OR 1.90; 95% CI 1.20-3.00), better microbial eradication rate (OR 2.70; 95% CI 1.90-3.90) than the IV polymyxin-containing regimen, and significantly better microbial eradication rate when compared with the IH polymyxin-containing regimen (OR 2.30; 95% CI 1.30-4.20). Furthermore, compared with IV + IH and IV polymyxin-containing regimens, the IH polymyxin-containing regimen showed a significant reduction in acute kidney injury. CONCLUSIONS Our study indicates that among the three administration regimens, the IV + IH polymyxin-containing regimen may be the most effective for treating MDR-GNB pneumonia, with a significantly lower overall mortality compared to the IV regimen and a considerably higher microbial eradication rate compared to the IH regimen. The IH regimen may be considered superior to the IV regimen due to its substantially lower incidence of acute kidney injury, even though the reduction in overall mortality was not significant.
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Affiliation(s)
- Yi Zhou
- Department of Critical Care Medicine, Zhujiang Hospital, The Second School of Clinical Medicine, Southern Medical University, 253 Gongye Rd, Guangzhou, 510282, China
| | - Guizhong Wang
- Department of Critical Care Medicine, Zhujiang Hospital, The Second School of Clinical Medicine, Southern Medical University, 253 Gongye Rd, Guangzhou, 510282, China
| | - Ying Zhao
- Department of Critical Care Medicine, Zhujiang Hospital, The Second School of Clinical Medicine, Southern Medical University, 253 Gongye Rd, Guangzhou, 510282, China
| | - Weijia Chen
- Department of Critical Care Medicine, Zhujiang Hospital, The Second School of Clinical Medicine, Southern Medical University, 253 Gongye Rd, Guangzhou, 510282, China
| | - Xuyan Chen
- Department of Critical Care Medicine, Zhujiang Hospital, The Second School of Clinical Medicine, Southern Medical University, 253 Gongye Rd, Guangzhou, 510282, China
| | - Yuqi Qiu
- Department of Critical Care Medicine, Zhujiang Hospital, The Second School of Clinical Medicine, Southern Medical University, 253 Gongye Rd, Guangzhou, 510282, China
| | - Yuanyu Liu
- Department of Critical Care Medicine, Zhujiang Hospital, The Second School of Clinical Medicine, Southern Medical University, 253 Gongye Rd, Guangzhou, 510282, China
| | - Shuqi Wu
- Department of Critical Care Medicine, Zhujiang Hospital, The Second School of Clinical Medicine, Southern Medical University, 253 Gongye Rd, Guangzhou, 510282, China
| | - Jianbin Guan
- Department of Critical Care Medicine, Zhujiang Hospital, The Second School of Clinical Medicine, Southern Medical University, 253 Gongye Rd, Guangzhou, 510282, China
| | - Ping Chang
- Department of Critical Care Medicine, Zhujiang Hospital, The Second School of Clinical Medicine, Southern Medical University, 253 Gongye Rd, Guangzhou, 510282, China
| | - Yong Liu
- Department of Intensive Care Unit, Shenzhen Hospital, Southern Medical University, Shenzhen, China.
| | - Zhanguo Liu
- Department of Critical Care Medicine, Zhujiang Hospital, The Second School of Clinical Medicine, Southern Medical University, 253 Gongye Rd, Guangzhou, 510282, China.
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Changsan N, Atipairin A, Muenraya P, Sritharadol R, Srichana T, Balekar N, Sawatdee S. In Vitro Evaluation of Colistin Conjugated with Chitosan-Capped Gold Nanoparticles as a Possible Formulation Applied in a Metered-Dose Inhaler. Antibiotics (Basel) 2024; 13:630. [PMID: 39061312 PMCID: PMC11274357 DOI: 10.3390/antibiotics13070630] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2024] [Revised: 06/30/2024] [Accepted: 07/04/2024] [Indexed: 07/28/2024] Open
Abstract
Inhaled colistin is used to treat pneumonia and respiratory infections through nebulization or dry powder inhalers. Nevertheless, the development of a metered-dose inhaler (MDI) for colistin, which could enhance patient convenience and treatment efficacy, has not yet been developed. Colistin is known for its ability to induce cellular toxicity. Gold nanoparticles (AuNPs) can potentially mitigate colistin toxicity. Therefore, this study aimed to evaluate the antimicrobial effectiveness of colistin conjugated with chitosan-capped gold nanoparticles (Col-CS-AuNPs) and their potential formulation for use with MDIs to deliver the aerosol directly to the deep lung. Fourier-transform infrared spectroscopy, nuclear magnetic resonance, and elemental analysis were used to characterize the synthesized Col-CS-AuNPs. Drug release profiles fitted with the most suitable release kinetic model were evaluated. An MDI formulation containing 100 µg of colistin per puff was prepared. The aerosol properties used to determine the MDI performance included the fine particle fraction, mass median aerodynamic diameter, and geometric standard deviation, which were evaluated using the Andersen Cascade Impactor. The delivered dose uniformity was also determined. The antimicrobial efficacy of the Col-CS-AuNP formulation in the MDI was assessed. The chitosan-capped gold nanoparticles (CS-AuNPs) and Col-CS-AuNPs had particle sizes of 44.34 ± 1.02 and 174.50 ± 4.46 nm, respectively. CS-AuNPs effectively entrapped 76.4% of colistin. Col-CS-AuNPs exhibited an initial burst release of up to 60% colistin within the first 6 h. The release mechanism was accurately described by the Korsmeyer-Peppas model, with an R2 > 0.95. The aerosol properties of the Col-CS-AuNP formulation in the MDI revealed a high fine particle fraction of 61.08%, mass median aerodynamic diameter of 2.34 µm, and geometric standard deviation of 0.21, with a delivered dose uniformity within 75-125% of the labeled claim. The Col-CS-AuNP MDI formulation completely killed Escherichia coli at 5× and 10× minimum inhibitory concentrations after 6 and 12 h of incubation, respectively. The toxicity of CS-AuNP and Col-CS-AuNP MDI formulations in upper and lower respiratory tract cell lines was lower than that of free colistin. The stability of the Col-CS-AuNP MDI formulation was maintained for at least 3 months. The Col-CS-AuNP MDI formulation effectively eradicated bacteria over a 12-h period, showing promise for advancing lung infection treatments.
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Affiliation(s)
- Narumon Changsan
- College of Pharmacy, Rangsit University, Pathum Thani 12000, Thailand;
| | - Apichart Atipairin
- School of Pharmacy, Walailak University, Thasala 80160, Nakhon Si Thammarat, Thailand; (A.A.); (P.M.)
- Drug and Cosmetics Excellence Center, Walailak University, Thasala 80160, Nakhon Si Thammarat, Thailand
| | - Poowadon Muenraya
- School of Pharmacy, Walailak University, Thasala 80160, Nakhon Si Thammarat, Thailand; (A.A.); (P.M.)
- Drug and Cosmetics Excellence Center, Walailak University, Thasala 80160, Nakhon Si Thammarat, Thailand
| | - Rutthapol Sritharadol
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmaceutical Sciences, Chulalongkorn University, Bangkok 10330, Thailand;
| | - Teerapol Srichana
- Drug Delivery System Excellence Center, Department of Pharmaceutical Technology, Faculty of Pharmaceutical Sciences, Prince of Songkla University, Hat Yai 90112, Songkhla, Thailand;
| | - Neelam Balekar
- College of Pharmacy, IPS Academy, Indore 452012, Madhya Pradesh, India;
| | - Somchai Sawatdee
- School of Pharmacy, Walailak University, Thasala 80160, Nakhon Si Thammarat, Thailand; (A.A.); (P.M.)
- Drug and Cosmetics Excellence Center, Walailak University, Thasala 80160, Nakhon Si Thammarat, Thailand
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Peng L, Zhang Z, Qi X, Zhong Y, Sun T, Chen L, Zhu J, Lv X, Ma P. Efficiency of polymyxin B treatment against nosocomial infection: a systematic review and meta-analysis. Front Med (Lausanne) 2024; 11:1400757. [PMID: 38863886 PMCID: PMC11165566 DOI: 10.3389/fmed.2024.1400757] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2024] [Accepted: 05/14/2024] [Indexed: 06/13/2024] Open
Abstract
Background Some cohort studies have explored the effects and safety of polymyxin B (PMB) in comparison to other antibiotics for the treatment of nosocomial infections, yielding inconsistent results. This systematic review aims to explore the effectiveness and safety of PMB and compared it with other antibiotics. Methods A systematic literature search was conducted in PubMed, Embase, the Cochrane Library, and Web of Science, searching specific terms to identify quantitative cohort studies or RCTs that compared the effects of PMB with other antibiotics in terms of their efficacy and safety. The Newcastle-Ottawa Scale (NOS) was conducted to evaluate the risk of bias of observational studies. Odds ratios with 95% confidence intervals were used for outcome assessment. We evaluated heterogeneity using the I 2 test. Results A total of 22 observational trials were included in the analysis. The PMB group had a higher mortality rate compared to the control group (odds ratio: 1.84, 95% CI: 1.36-2.50, p<0.00001, I 2 = 73%). while, the ceftazidime-avibactam group demonstrated a distinct advantage with lower mortality rates, despite still exhibiting high heterogeneity (odds ratio 2.73, 95% confidence interval 1.59-4.69; p = 0.0003; I 2 = 53%). Additionally, the PMB group had a lower nephrotoxicity rate compared to the colistin group but exhibited high heterogeneity in the results (odds ratio 0.58, 95% CI 0.36-0.93; p = 0.02; I 2 = 73%). Conclusion In patients with nosocomial infections, PMB is not superior to other antibiotics in terms of mortality, specifically when compared to ceftazidime-avibactam. However, PMB demonstrated an advantage in terms of nephrotoxicity compared to colistin.
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Affiliation(s)
- Liyuan Peng
- Department of Critical Care Medicine, Affiliated Hospital of Chengdu University, Chengdu, Sichuan, China
| | - Zhongheng Zhang
- Department of Emergency Medicine, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Xueyan Qi
- Department of Emergency and Critical Care Medicine, Henan Engineering Research Center for Critical Care Medicine, Henan Key Laboratory of Critical Care Medicine, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Yanjun Zhong
- Critical Care Medicine, The Second Xiangya Hospital, Changsha, Hunan, China
| | - Tongwen Sun
- Department of Emergency and Critical Care Medicine, Henan Engineering Research Center for Critical Care Medicine, Henan Key Laboratory of Critical Care Medicine, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Lvlin Chen
- Department of Critical Care Medicine, Affiliated Hospital of Chengdu University, Chengdu, Sichuan, China
| | - Junchen Zhu
- Department of Critical Care Medicine, Affiliated Hospital of Chengdu University, Chengdu, Sichuan, China
| | - Xiangui Lv
- Department of Critical Care Medicine, Affiliated Hospital of Chengdu University, Chengdu, Sichuan, China
| | - Penglin Ma
- Department of Critical Care Medicine, Guiqian International General Hospital, Guiyang, Guizhou, China
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Buendía JA, Guerrero Patiño D, Zuluaga Salazar AF. Efficacy of adjunctive inhaled colistin and tobramycin for ventilator-associated pneumonia: systematic review and meta-analysis. BMC Pulm Med 2024; 24:213. [PMID: 38698403 PMCID: PMC11064396 DOI: 10.1186/s12890-024-03032-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2023] [Accepted: 04/22/2024] [Indexed: 05/05/2024] Open
Abstract
INTRODUCTION Ventilator-associated pneumonia (VAP) presents a significant challenge in intensive care units (ICUs). Nebulized antibiotics, particularly colistin and tobramycin, are commonly prescribed for VAP patients. However, the appropriateness of using inhaled antibiotics for VAP remains a subject of debate among experts. This study aims to provide updated insights on the efficacy of adjunctive inhaled colistin and tobramycin through a comprehensive systematic review and meta-analysis. METHODS A thorough search was conducted in MEDLINE, EMBASE, LILACS, COCHRANE Central, and clinical trials databases ( www. CLINICALTRIALS gov ) from inception to June 2023. Randomized controlled trials (RCTs) meeting specific inclusion criteria were selected for analysis. These criteria included mechanically ventilated patients diagnosed with VAP, intervention with inhaled Colistin and Tobramycin compared to intravenous antibiotics, and reported outcomes such as clinical cure, microbiological eradication, mortality, or adverse events. RESULTS The initial search yielded 106 records, from which only seven RCTs fulfilled the predefined inclusion criteria. The meta-analysis revealed a higher likelihood of achieving both clinical and microbiological cure in the groups receiving tobramycin or colistin compared to the control group. The relative risk (RR) for clinical cure was 1.23 (95% CI: 1.04, 1.45), and for microbiological cure, it was 1.64 (95% CI: 1.31, 2.06). However, there were no significant differences in mortality or the probability of adverse events between the groups. CONCLUSION Adjunctive inhaled tobramycin or colistin may have a positive impact on the clinical and microbiological cure rates of VAP. However, the overall quality of evidence is low, indicating a high level of uncertainty. These findings underscore the need for further rigorous and well-designed studies to enhance the quality of evidence and provide more robust guidance for clinical decision-making in the management of VAP.
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Affiliation(s)
- Jefferson Antonio Buendía
- Research Group in Pharmacology and Toxicology, Department of Pharmacology and Toxicology, University of Antioquia, Medellín, Colombia.
- Division of Health Sciences, Warwick Medical School, University of Warwick, Coventry, UK.
- Facultad de Medicina, Universidad de Antioquia, Carrera 51D #62-29, Medellín, Colombia.
| | - Diana Guerrero Patiño
- Research Group in Pharmacology and Toxicology, Department of Pharmacology and Toxicology, University of Antioquia, Medellín, Colombia
| | - Andrés Felipe Zuluaga Salazar
- Research Group in Pharmacology and Toxicology, Department of Pharmacology and Toxicology, University of Antioquia, Medellín, Colombia
- Laboratorio Integrado de Medicina Especializada (LIME), Facultad de Medicina, IPS Universitaria, Universidad de Antioquia, Antioquia, Colombia
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Rafailidis P, Panagopoulos P, Koutserimpas C, Samonis G. Current Therapeutic Approaches for Multidrug-Resistant and Extensively Drug-Resistant Acinetobacter baumannii Infections. Antibiotics (Basel) 2024; 13:261. [PMID: 38534696 DOI: 10.3390/antibiotics13030261] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2024] [Revised: 02/28/2024] [Accepted: 03/06/2024] [Indexed: 03/28/2024] Open
Abstract
The treatment of Acinetobacter baumannii infections remains a challenge for physicians worldwide in the 21st century. The bacterium possesses a multitude of mechanisms to escape the human immune system. The consequences of A. baumannii infections on morbidity and mortality, as well on financial resources, remain dire. Furthermore, A. baumannii superinfections have also occurred during the COVID-19 pandemic. While prevention is important, the antibiotic armamentarium remains the most essential factor for the treatment of these infections. The main problem is the notorious resistance profile (including resistance to carbapenems and colistin) that this bacterium exhibits. While newer beta lactam/beta-lactamase inhibitors have entered clinical practice, with excellent results against various infections due to Enterobacteriaceae, their contribution against A. baumannii infections is almost absent. Hence, we have to resort to at least one of the following, sulbactam, polymyxins E or B, tigecycline or aminoglycosides, against multidrug-resistant (MDR) and extensively drug-resistant (XDR) A. baumannii infections. Furthermore, the notable addition of cefiderocol in the fight against A. baumannii infections represents a useful addition. We present herein the existing information from the last decade regarding therapeutic advances against MDR/XDR A. baumannii infections.
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Affiliation(s)
- Petros Rafailidis
- Second University Department of Internal Medicine, University General Hospital of Alexandroupolis, 681 00 Alexandroupolis, Greece
| | - Periklis Panagopoulos
- Second University Department of Internal Medicine, University General Hospital of Alexandroupolis, 681 00 Alexandroupolis, Greece
| | - Christos Koutserimpas
- Department of Orthopaedics and Traumatology, "251" Hellenic Air Force General Hospital of Athens, 115 25 Athens, Greece
| | - George Samonis
- Department of Oncology, Metropolitan Hospital, 185 47 Athens, Greece
- Department of Medicine, University of Crete, 715 00 Heraklion, Greece
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Andrianopoulos I, Kazakos N, Lagos N, Maniatopoulou T, Papathanasiou A, Papathanakos G, Koulenti D, Toli E, Gartzonika K, Koulouras V. Co-Administration of High-Dose Nebulized Colistin for Acinetobacter baumannii Bacteremic Ventilator-Associated Pneumonia: Impact on Outcomes. Antibiotics (Basel) 2024; 13:169. [PMID: 38391555 PMCID: PMC10886014 DOI: 10.3390/antibiotics13020169] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2024] [Revised: 02/04/2024] [Accepted: 02/05/2024] [Indexed: 02/24/2024] Open
Abstract
Acinetobacter baumannii (A. baumannii) is a difficult-to-treat (DTR) pathogen that causes ventilator-associated pneumonia (VAP) associated with high mortality. To improve the outcome of DTR A. Baumannii VAP, nebulized colistin (NC) was introduced with promising but conflicting results on mortality in earlier studies. Currently, NC is used at a much higher daily dose compared to the past. Nevertheless, there is little evidence on the effect of high-dose NC on the outcomes of A. baumannii VAPs, especially in the current era where the percentage of colistin-resistant A. baumannii strains is rising. We conducted a retrospective study comparing bacteremic A. baumannii VAP patients who were treated with and without NC co-administration and were admitted in the Intensive Care Unit of University Hospital of Ioannina from March 2020 to August 2023. Overall, 59 patients (21 and 38 with and without NC coadministration, respectively) were included. Both 28-day and 7-day mortalities were significantly lower in the patient group treated with NC (52.4% vs. 78.9%, p 0.034 and 9.5% vs. 47.4%, p 0.003, respectively). Patients treated with NC had a higher percentage of sepsis resolution by day 7 (38.1% vs. 13.5%, p 0.023) and were more likely to be off vasopressors by day 7 (28.6% vs. 8.1%, p 0.039). The addition of NC in the treatment regime of A. baumannii VAP decreased mortality.
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Affiliation(s)
| | - Nikolaos Kazakos
- Intensive Care Unit, University Hospital of Ioannina, 45500 Ioannina, Greece
| | - Nikolaos Lagos
- Intensive Care Unit, University Hospital of Ioannina, 45500 Ioannina, Greece
| | | | | | | | - Despoina Koulenti
- UQ Centre for Clinical Research, Faculty of Medicine, The University of Queensland, Brisbane, QLD 4029, Australia
- Second Critical Care Department, Attikon University Hospital, Rimini Street, 12462 Athens, Greece
| | - Eleni Toli
- Intensive Care Unit, University Hospital of Ioannina, 45500 Ioannina, Greece
| | | | - Vasilios Koulouras
- Intensive Care Unit, University Hospital of Ioannina, 45500 Ioannina, Greece
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Honore PM, Perriens E, Blackman S. Nebulized colistin as the adjunctive treatment for ventilator-associated pneumonia: A systematic review and meta-analysis. J Crit Care 2024; 79:154466. [PMID: 37980254 DOI: 10.1016/j.jcrc.2023.154466] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Accepted: 11/08/2023] [Indexed: 11/20/2023]
Affiliation(s)
- Patrick M Honore
- UCL University and Head of ICU, CHU UCL Godinne Namur, UCL Louvain Medical Shool, Belgium.
| | - Emily Perriens
- ULB University, Centre Hospitalier Universitaire Brugmann, Brussels, Belgium
| | - Sydney Blackman
- ULB University, Centre Hospitalier Universitaire Brugmann, Brussels, Belgium
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11
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Bouza E, Muñoz P, Burillo A. How to treat severe Acinetobacter baumannii infections. Curr Opin Infect Dis 2023; 36:596-608. [PMID: 37930071 DOI: 10.1097/qco.0000000000000974] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2023]
Abstract
PURPOSE OF REVIEW To update the management of severe Acinetobacter baumannii infections (ABI), particularly those caused by multi-resistant isolates. RECENT FINDINGS The in vitro activity of the various antimicrobial agents potentially helpful in treating ABI is highly variable and has progressively decreased for many of them, limiting current therapeutic options. The combination of more than one drug is still advisable in most circumstances. Ideally, two active first-line drugs should be used. Alternatively, a first-line and a second-line drug and, if this is not possible, two or more second-line drugs in combination. The emergence of new agents such as Cefiderocol, the combination of Sulbactam and Durlobactam, and the new Tetracyclines offer therapeutic options that need to be supported by clinical evidence. SUMMARY The apparent limitations in treating infections caused by this bacterium, the rapid development of resistance, and the serious underlying situation in most cases invite the search for alternatives to antibiotic treatment, the most promising of which seems to be bacteriophage therapy.
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Affiliation(s)
- Emilio Bouza
- Department of Clinical Microbiology and Infectious Diseases, Hospital General Universitario Gregorio Marañón
- Medicine Department, School of Medicine, Universidad Complutense de Madrid
- Gregorio Marañón Health Research Institute
- CIBER of Respiratory Diseases (CIBERES CB06/06/0058), Madrid, Spain
| | - Patricia Muñoz
- Department of Clinical Microbiology and Infectious Diseases, Hospital General Universitario Gregorio Marañón
- Medicine Department, School of Medicine, Universidad Complutense de Madrid
- Gregorio Marañón Health Research Institute
- CIBER of Respiratory Diseases (CIBERES CB06/06/0058), Madrid, Spain
| | - Almudena Burillo
- Department of Clinical Microbiology and Infectious Diseases, Hospital General Universitario Gregorio Marañón
- Medicine Department, School of Medicine, Universidad Complutense de Madrid
- Gregorio Marañón Health Research Institute
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